{"id":570864,"date":"2026-07-27T15:07:50","date_gmt":"2026-07-27T08:07:50","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=570864"},"modified":"2026-07-27T15:07:50","modified_gmt":"2026-07-27T08:07:50","slug":"song-am-la-gi","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/song-am-la-gi\/","title":{"rendered":"S\u00f3ng \u00e2m l\u00e0 g\u00ec? M\u00f4i tr\u01b0\u1eddng truy\u1ec1n, t\u1ed1c \u0111\u1ed9 v\u00e0 \u0111\u1eb7c tr\u01b0ng c\u1ee7a \u00e2m"},"content":{"rendered":"<p><strong>S\u00f3ng \u00e2m l\u00e0 s\u00f3ng c\u01a1 lan truy\u1ec1n trong c\u00e1c m\u00f4i tr\u01b0\u1eddng v\u1eadt ch\u1ea5t r\u1eafn, l\u1ecfng v\u00e0 kh\u00ed, \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi dao \u0111\u1ed9ng c\u1ee7a ngu\u1ed3n \u00e2m; s\u00f3ng \u00e2m kh\u00f4ng truy\u1ec1n \u0111\u01b0\u1ee3c trong ch\u00e2n kh\u00f4ng.<\/strong> Tai ng\u01b0\u1eddi b\u00ecnh th\u01b0\u1eddng nghe \u0111\u01b0\u1ee3c s\u00f3ng \u00e2m c\u00f3 t\u1ea7n s\u1ed1 kho\u1ea3ng t\u1eeb 16 Hz \u0111\u1ebfn 20.000 Hz. \u0110\u00e2y l\u00e0 ki\u1ebfn th\u1ee9c V\u1eadt l\u00fd quan tr\u1ecdng, g\u1eafn li\u1ec1n v\u1edbi nhi\u1ec1u hi\u1ec7n t\u01b0\u1ee3ng v\u00e0 \u1ee9ng d\u1ee5ng quen thu\u1ed9c trong \u0111\u1eddi s\u1ed1ng. B\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 s\u00f3ng \u00e2m l\u00e0 g\u00ec, m\u00f4i tr\u01b0\u1eddng truy\u1ec1n \u00e2m, t\u1ed1c \u0111\u1ed9 truy\u1ec1n \u00e2m, c\u00e1ch ph\u00e2n lo\u1ea1i theo t\u1ea7n s\u1ed1, c\u00e1c \u0111\u1eb7c tr\u01b0ng v\u1eadt l\u00fd v\u00e0 sinh l\u00fd c\u1ee7a \u00e2m c\u00f9ng b\u00e0i t\u1eadp v\u1eadn d\u1ee5ng c\u00f3 l\u1eddi gi\u1ea3i.<\/p>\n<h2>S\u00f3ng \u00e2m l\u00e0 g\u00ec?<\/h2>\n<p>S\u00f3ng \u00e2m l\u00e0 nh\u1eefng s\u00f3ng c\u01a1 h\u1ecdc lan truy\u1ec1n trong m\u00f4i tr\u01b0\u1eddng v\u1eadt ch\u1ea5t, sinh ra t\u1eeb dao \u0111\u1ed9ng c\u1ee7a c\u00e1c v\u1eadt (g\u1ecdi l\u00e0 ngu\u1ed3n \u00e2m) nh\u01b0 d\u00e2y \u0111\u00e0n, m\u00e0ng loa hay d\u00e2y thanh qu\u1ea3n. Khi ngu\u1ed3n \u00e2m dao \u0111\u1ed9ng, n\u00f3 l\u00e0m c\u00e1c ph\u1ea7n t\u1eed m\u00f4i tr\u01b0\u1eddng xung quanh dao \u0111\u1ed9ng theo v\u00e0 truy\u1ec1n n\u0103ng l\u01b0\u1ee3ng \u0111i xa d\u01b0\u1edbi d\u1ea1ng s\u00f3ng, \u0111\u1ebfn tai ta g\u00e2y c\u1ea3m gi\u00e1c \u00e2m thanh. Trong ch\u1ea5t kh\u00ed v\u00e0 ch\u1ea5t l\u1ecfng, s\u00f3ng \u00e2m l\u00e0 <strong>s\u00f3ng d\u1ecdc<\/strong>: ph\u01b0\u01a1ng dao \u0111\u1ed9ng c\u1ee7a c\u00e1c ph\u1ea7n t\u1eed tr\u00f9ng v\u1edbi ph\u01b0\u01a1ng truy\u1ec1n s\u00f3ng. B\u1ea3n ch\u1ea5t dao \u0111\u1ed9ng c\u1ee7a ngu\u1ed3n \u00e2m c\u0169ng l\u00e0 m\u1ed9t d\u1ea1ng <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/dao-dong-dieu-hoa-la-gi\/\">dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a<\/a> khi ngu\u1ed3n ph\u00e1t ra \u00e2m \u0111\u01a1n gi\u1ea3n.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-570865\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-1.jpg\" alt=\"song-am-1\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-1.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-1-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-1-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>M\u00f4i tr\u01b0\u1eddng truy\u1ec1n \u00e2m<\/h2>\n<p>S\u00f3ng \u00e2m truy\u1ec1n \u0111\u01b0\u1ee3c trong ba m\u00f4i tr\u01b0\u1eddng: <strong>ch\u1ea5t r\u1eafn, ch\u1ea5t l\u1ecfng v\u00e0 ch\u1ea5t kh\u00ed<\/strong>. S\u00f3ng \u00e2m <strong>kh\u00f4ng truy\u1ec1n \u0111\u01b0\u1ee3c trong ch\u00e2n kh\u00f4ng<\/strong>, v\u00ec ch\u00e2n kh\u00f4ng kh\u00f4ng c\u00f3 c\u00e1c ph\u1ea7n t\u1eed v\u1eadt ch\u1ea5t \u0111\u1ec3 dao \u0111\u1ed9ng v\u00e0 truy\u1ec1n n\u0103ng l\u01b0\u1ee3ng. \u0110\u00e2y l\u00e0 l\u00fd do trong v\u0169 tr\u1ee5 (m\u00f4i tr\u01b0\u1eddng g\u1ea7n nh\u01b0 ch\u00e2n kh\u00f4ng), c\u00e1c nh\u00e0 du h\u00e0nh kh\u00f4ng th\u1ec3 nghe th\u1ea5y ti\u1ebfng n\u00f3i tr\u1ef1c ti\u1ebfp m\u00e0 ph\u1ea3i li\u00ean l\u1ea1c qua b\u1ed9 \u0111\u00e0m b\u1eb1ng s\u00f3ng v\u00f4 tuy\u1ebfn.<\/p>\n<h2>T\u1ed1c \u0111\u1ed9 truy\u1ec1n \u00e2m<\/h2>\n<p>T\u1ed1c \u0111\u1ed9 truy\u1ec1n \u00e2m ph\u1ee5 thu\u1ed9c v\u00e0o b\u1ea3n ch\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a m\u00f4i tr\u01b0\u1eddng. B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y t\u1ed5ng h\u1ee3p t\u1ed1c \u0111\u1ed9 truy\u1ec1n \u00e2m x\u1ea5p x\u1ec9 trong m\u1ed9t s\u1ed1 m\u00f4i tr\u01b0\u1eddng th\u01b0\u1eddng g\u1eb7p.<\/p>\n<table>\n<thead>\n<tr>\n<th>M\u00f4i tr\u01b0\u1eddng<\/th>\n<th>T\u1ed1c \u0111\u1ed9 truy\u1ec1n \u00e2m (x\u1ea5p x\u1ec9)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Kh\u00f4ng kh\u00ed (kho\u1ea3ng 20\u00b0C)<\/td>\n<td>340 m\/s<\/td>\n<\/tr>\n<tr>\n<td>N\u01b0\u1edbc<\/td>\n<td>Kho\u1ea3ng 1.500 m\/s<\/td>\n<\/tr>\n<tr>\n<td>Th\u00e9p<\/td>\n<td>Kho\u1ea3ng 5.000 m\/s tr\u1edf l\u00ean<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Nh\u1eadn x\u00e9t: t\u1ed1c \u0111\u1ed9 truy\u1ec1n \u00e2m trong <strong>ch\u1ea5t r\u1eafn &gt; ch\u1ea5t l\u1ecfng &gt; ch\u1ea5t kh\u00ed<\/strong>, v\u00ec c\u00e1c ph\u1ea7n t\u1eed trong ch\u1ea5t r\u1eafn li\u00ean k\u1ebft ch\u1eb7t ch\u1ebd h\u01a1n n\u00ean truy\u1ec1n dao \u0111\u1ed9ng nhanh h\u01a1n. T\u1ed1c \u0111\u1ed9 truy\u1ec1n \u00e2m c\u0169ng t\u0103ng khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-570866\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-2.jpg\" alt=\"song-am-2\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-2.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-2-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-2-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>Ph\u00e2n lo\u1ea1i s\u00f3ng \u00e2m theo t\u1ea7n s\u1ed1<\/h2>\n<p>D\u1ef1a v\u00e0o <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/tan-so-goc-la-gi\/\">t\u1ea7n s\u1ed1<\/a>, ng\u01b0\u1eddi ta chia s\u00f3ng \u00e2m th\u00e0nh ba lo\u1ea1i ch\u00ednh:<\/p>\n<ul>\n<li><strong>H\u1ea1 \u00e2m:<\/strong> t\u1ea7n s\u1ed1 d\u01b0\u1edbi 16 Hz, tai ng\u01b0\u1eddi kh\u00f4ng nghe \u0111\u01b0\u1ee3c.<\/li>\n<li><strong>\u00c2m nghe \u0111\u01b0\u1ee3c:<\/strong> t\u1ea7n s\u1ed1 kho\u1ea3ng 16 Hz \u0111\u1ebfn 20.000 Hz.<\/li>\n<li><strong>Si\u00eau \u00e2m:<\/strong> t\u1ea7n s\u1ed1 tr\u00ean 20.000 Hz, tai ng\u01b0\u1eddi kh\u00f4ng nghe \u0111\u01b0\u1ee3c nh\u01b0ng nhi\u1ec1u lo\u00e0i v\u1eadt nh\u01b0 d\u01a1i, c\u00e1 heo c\u00f3 th\u1ec3 nghe ho\u1eb7c ph\u00e1t ra.<\/li>\n<\/ul>\n<h2>C\u00e1c \u0111\u1eb7c tr\u01b0ng v\u1eadt l\u00fd v\u00e0 sinh l\u00fd c\u1ee7a \u00e2m<\/h2>\n<p>M\u1ed7i \u0111\u1eb7c tr\u01b0ng v\u1eadt l\u00fd c\u1ee7a \u00e2m g\u1eafn v\u1edbi m\u1ed9t \u0111\u1eb7c tr\u01b0ng sinh l\u00fd (c\u1ea3m gi\u00e1c) m\u00e0 tai ng\u01b0\u1eddi c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c:<\/p>\n<ul>\n<li><strong>T\u1ea7n s\u1ed1<\/strong> quy\u1ebft \u0111\u1ecbnh <strong>\u0111\u1ed9 cao<\/strong> c\u1ee7a \u00e2m: t\u1ea7n s\u1ed1 c\u00e0ng l\u1edbn, \u00e2m c\u00e0ng cao (b\u1ed5ng); t\u1ea7n s\u1ed1 nh\u1ecf cho \u00e2m tr\u1ea7m.<\/li>\n<li><strong>C\u01b0\u1eddng \u0111\u1ed9 (bi\u00ean \u0111\u1ed9) \u00e2m<\/strong> quy\u1ebft \u0111\u1ecbnh <strong>\u0111\u1ed9 to<\/strong> c\u1ee7a \u00e2m: c\u01b0\u1eddng \u0111\u1ed9 c\u00e0ng l\u1edbn, \u00e2m nghe c\u00e0ng to.<\/li>\n<li><strong>\u0110\u1ed3 th\u1ecb dao \u0111\u1ed9ng \u00e2m<\/strong> quy\u1ebft \u0111\u1ecbnh <strong>\u00e2m s\u1eafc<\/strong>: gi\u00fap ta ph\u00e2n bi\u1ec7t c\u00f9ng m\u1ed9t n\u1ed1t nh\u1ea1c do \u0111\u00e0n ghi-ta hay s\u00e1o ph\u00e1t ra.<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-570867\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-3.jpg\" alt=\"song-am-3\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-3.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-3-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-3-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>\u1ee8ng d\u1ee5ng c\u1ee7a s\u00f3ng \u00e2m<\/h2>\n<p>S\u00f3ng \u00e2m c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng quan tr\u1ecdng: si\u00eau \u00e2m trong y h\u1ecdc \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n h\u00ecnh \u1ea3nh; sonar d\u00f9ng \u0111\u1ec3 d\u00f2 \u0111\u1ed9 s\u00e2u \u0111\u00e1y bi\u1ec3n v\u00e0 ph\u00e1t hi\u1ec7n v\u1eadt th\u1ec3 d\u01b0\u1edbi n\u01b0\u1edbc; ki\u1ec3m tra khuy\u1ebft t\u1eadt v\u1eadt li\u1ec7u b\u1eb1ng si\u00eau \u00e2m; c\u1ea3m bi\u1ebfn si\u00eau \u00e2m \u0111o kho\u1ea3ng c\u00e1ch trong k\u1ef9 thu\u1eadt. Ngo\u00e0i ra, hi\u1ec3u v\u1ec1 s\u00f3ng \u00e2m c\u00f2n gi\u00fap thi\u1ebft k\u1ebf ph\u00f2ng thu, h\u1ed9i tr\u01b0\u1eddng c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh t\u1ed1t.<\/p>\n<h2>B\u00e0i t\u1eadp v\u1eadn d\u1ee5ng c\u00f3 l\u1eddi gi\u1ea3i<\/h2>\n<ul>\n<li><strong>B\u00e0i 1:<\/strong> \u00c2m truy\u1ec1n trong kh\u00f4ng kh\u00ed v\u1edbi t\u1ed1c \u0111\u1ed9 340 m\/s. Sau 2 gi\u00e2y \u00e2m \u0111i \u0111\u01b0\u1ee3c bao xa? <em>L\u1eddi gi\u1ea3i:<\/em> s = v \u00d7 t = 340 \u00d7 2 = 680 m.<\/li>\n<li><strong>B\u00e0i 2:<\/strong> M\u1ed9t ng\u01b0\u1eddi nghe th\u1ea5y ti\u1ebfng s\u1ea5m sau 3 gi\u00e2y k\u1ec3 t\u1eeb khi th\u1ea5y tia ch\u1edbp. \u01af\u1edbc t\u00ednh kho\u1ea3ng c\u00e1ch \u0111\u1ebfn n\u01a1i c\u00f3 s\u1ea5m. <em>L\u1eddi gi\u1ea3i:<\/em> s \u2248 340 \u00d7 3 = 1.020 m (kho\u1ea3ng 1 km).<\/li>\n<li><strong>B\u00e0i 3:<\/strong> \u00c2m c\u00f3 t\u1ea7n s\u1ed1 25.000 Hz thu\u1ed9c lo\u1ea1i n\u00e0o? <em>L\u1eddi gi\u1ea3i:<\/em> l\u00e0 si\u00eau \u00e2m, v\u00ec l\u1edbn h\u01a1n 20.000 Hz.<\/li>\n<li><strong>B\u00e0i 4 (tr\u1eafc nghi\u1ec7m):<\/strong> S\u00f3ng \u00e2m kh\u00f4ng truy\u1ec1n \u0111\u01b0\u1ee3c trong m\u00f4i tr\u01b0\u1eddng n\u00e0o? A. Ch\u1ea5t r\u1eafn B. Ch\u1ea5t l\u1ecfng C. Ch\u1ea5t kh\u00ed D. Ch\u00e2n kh\u00f4ng. <em>\u0110\u00e1p \u00e1n:<\/em> D.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-570868\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-4.jpg\" alt=\"song-am-4\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-4.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-4-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am-4-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 s\u00f3ng \u00e2m<\/h2>\n<h3>S\u00f3ng \u00e2m l\u00e0 g\u00ec?<\/h3>\n<p>S\u00f3ng \u00e2m l\u00e0 s\u00f3ng c\u01a1 lan truy\u1ec1n trong m\u00f4i tr\u01b0\u1eddng r\u1eafn, l\u1ecfng, kh\u00ed do dao \u0111\u1ed9ng c\u1ee7a ngu\u1ed3n \u00e2m; trong ch\u1ea5t kh\u00ed v\u00e0 ch\u1ea5t l\u1ecfng, s\u00f3ng \u00e2m l\u00e0 s\u00f3ng d\u1ecdc.<\/p>\n<h3>S\u00f3ng \u00e2m c\u00f3 truy\u1ec1n trong ch\u00e2n kh\u00f4ng kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng. Ch\u00e2n kh\u00f4ng kh\u00f4ng c\u00f3 ph\u1ea7n t\u1eed v\u1eadt ch\u1ea5t n\u00ean kh\u00f4ng c\u00f3 g\u00ec \u0111\u1ec3 dao \u0111\u1ed9ng v\u00e0 truy\u1ec1n n\u0103ng l\u01b0\u1ee3ng \u00e2m.<\/p>\n<h3>Tai ng\u01b0\u1eddi nghe \u0111\u01b0\u1ee3c \u00e2m c\u00f3 t\u1ea7n s\u1ed1 bao nhi\u00eau?<\/h3>\n<p>Tai ng\u01b0\u1eddi b\u00ecnh th\u01b0\u1eddng nghe \u0111\u01b0\u1ee3c \u00e2m c\u00f3 t\u1ea7n s\u1ed1 kho\u1ea3ng t\u1eeb 16 Hz \u0111\u1ebfn 20.000 Hz.<\/p>\n<h3>T\u1ed1c \u0111\u1ed9 truy\u1ec1n \u00e2m trong kh\u00f4ng kh\u00ed l\u00e0 bao nhi\u00eau?<\/h3>\n<p>Kho\u1ea3ng 340 m\/s \u1edf nhi\u1ec7t \u0111\u1ed9 ch\u1eebng 20\u00b0C; t\u1ed1c \u0111\u1ed9 n\u00e0y t\u0103ng khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng.<\/p>\n<h3>V\u00ec sao \u00e2m truy\u1ec1n trong ch\u1ea5t r\u1eafn nhanh h\u01a1n ch\u1ea5t kh\u00ed?<\/h3>\n<p>V\u00ec c\u00e1c ph\u1ea7n t\u1eed trong ch\u1ea5t r\u1eafn li\u00ean k\u1ebft ch\u1eb7t ch\u1ebd h\u01a1n n\u00ean truy\u1ec1n dao \u0111\u1ed9ng nhanh h\u01a1n ch\u1ea5t l\u1ecfng v\u00e0 ch\u1ea5t kh\u00ed.<\/p>\n<h3>H\u1ea1 \u00e2m v\u00e0 si\u00eau \u00e2m kh\u00e1c g\u00ec \u00e2m nghe \u0111\u01b0\u1ee3c?<\/h3>\n<p>H\u1ea1 \u00e2m c\u00f3 t\u1ea7n s\u1ed1 d\u01b0\u1edbi 16 Hz v\u00e0 si\u00eau \u00e2m c\u00f3 t\u1ea7n s\u1ed1 tr\u00ean 20.000 Hz, c\u1ea3 hai \u0111\u1ec1u n\u1eb1m ngo\u00e0i d\u1ea3i tai ng\u01b0\u1eddi nghe \u0111\u01b0\u1ee3c (16 Hz \u0111\u1ebfn 20.000 Hz).<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>T\u00f3m l\u1ea1i, <strong>s\u00f3ng \u00e2m l\u00e0 s\u00f3ng c\u01a1 truy\u1ec1n trong r\u1eafn, l\u1ecfng, kh\u00ed (kh\u00f4ng truy\u1ec1n trong ch\u00e2n kh\u00f4ng), v\u1edbi t\u1ed1c \u0111\u1ed9 trong kh\u00f4ng kh\u00ed kho\u1ea3ng 340 m\/s v\u00e0 d\u1ea3i nghe \u0111\u01b0\u1ee3c t\u1eeb 16 \u0111\u1ebfn 20.000 Hz<\/strong>. N\u1eafm v\u1eefng c\u00e1c \u0111\u1eb7c tr\u01b0ng v\u1eadt l\u00fd v\u00e0 sinh l\u00fd c\u1ee7a \u00e2m s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u nhi\u1ec1u hi\u1ec7n t\u01b0\u1ee3ng c\u0169ng nh\u01b0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf. \u0110\u1ec3 h\u1ecdc th\u00eam, m\u1eddi b\u1ea1n tham kh\u1ea3o c\u00e1c b\u00e0i ki\u1ebfn th\u1ee9c V\u1eadt l\u00fd kh\u00e1c tr\u00ean chuy\u00ean m\u1ee5c tin t\u1ee9c c\u1ee7a Ho\u00e0ng H\u00e0 Mobile.<\/p>\n<p>Xem th\u00eam:<\/p>\n<ul>\n<li><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/tan-so-goc-la-gi\/\">T\u1ea7n s\u1ed1 g\u00f3c l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c \u03c9 = 2\u03c0\/T v\u00e0 b\u00e0i t\u1eadp v\u1eadn d\u1ee5ng<\/a><\/li>\n<li><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/dao-dong-dieu-hoa-la-gi\/\">Dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a l\u00e0 g\u00ec? Ph\u01b0\u01a1ng tr\u00ecnh, chu k\u1ef3 v\u00e0 b\u00e0i t\u1eadp<\/a><\/li>\n<\/ul>\n<p><script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"S\u00f3ng \u00e2m l\u00e0 g\u00ec?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"S\u00f3ng \u00e2m l\u00e0 s\u00f3ng c\u01a1 lan truy\u1ec1n trong m\u00f4i tr\u01b0\u1eddng r\u1eafn, l\u1ecfng, kh\u00ed do dao \u0111\u1ed9ng c\u1ee7a ngu\u1ed3n \u00e2m; trong ch\u1ea5t kh\u00ed v\u00e0 ch\u1ea5t l\u1ecfng, s\u00f3ng \u00e2m l\u00e0 s\u00f3ng d\u1ecdc.\"}},{\"@type\":\"Question\",\"name\":\"S\u00f3ng \u00e2m c\u00f3 truy\u1ec1n trong ch\u00e2n kh\u00f4ng kh\u00f4ng?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Kh\u00f4ng. Ch\u00e2n kh\u00f4ng kh\u00f4ng c\u00f3 ph\u1ea7n t\u1eed v\u1eadt ch\u1ea5t n\u00ean kh\u00f4ng c\u00f3 g\u00ec \u0111\u1ec3 dao \u0111\u1ed9ng v\u00e0 truy\u1ec1n n\u0103ng l\u01b0\u1ee3ng \u00e2m.\"}},{\"@type\":\"Question\",\"name\":\"Tai ng\u01b0\u1eddi nghe \u0111\u01b0\u1ee3c \u00e2m c\u00f3 t\u1ea7n s\u1ed1 bao nhi\u00eau?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Tai ng\u01b0\u1eddi b\u00ecnh th\u01b0\u1eddng nghe \u0111\u01b0\u1ee3c \u00e2m c\u00f3 t\u1ea7n s\u1ed1 kho\u1ea3ng t\u1eeb 16 Hz \u0111\u1ebfn 20.000 Hz.\"}},{\"@type\":\"Question\",\"name\":\"T\u1ed1c \u0111\u1ed9 truy\u1ec1n \u00e2m trong kh\u00f4ng kh\u00ed l\u00e0 bao nhi\u00eau?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Kho\u1ea3ng 340 m\/s \u1edf nhi\u1ec7t \u0111\u1ed9 ch\u1eebng 20\u00b0C; t\u1ed1c \u0111\u1ed9 n\u00e0y t\u0103ng khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng.\"}},{\"@type\":\"Question\",\"name\":\"V\u00ec sao \u00e2m truy\u1ec1n trong ch\u1ea5t r\u1eafn nhanh h\u01a1n ch\u1ea5t kh\u00ed?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"V\u00ec c\u00e1c ph\u1ea7n t\u1eed trong ch\u1ea5t r\u1eafn li\u00ean k\u1ebft ch\u1eb7t ch\u1ebd h\u01a1n n\u00ean truy\u1ec1n dao \u0111\u1ed9ng nhanh h\u01a1n ch\u1ea5t l\u1ecfng v\u00e0 ch\u1ea5t kh\u00ed.\"}},{\"@type\":\"Question\",\"name\":\"H\u1ea1 \u00e2m v\u00e0 si\u00eau \u00e2m kh\u00e1c g\u00ec \u00e2m nghe \u0111\u01b0\u1ee3c?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"H\u1ea1 \u00e2m c\u00f3 t\u1ea7n s\u1ed1 d\u01b0\u1edbi 16 Hz v\u00e0 si\u00eau \u00e2m c\u00f3 t\u1ea7n s\u1ed1 tr\u00ean 20.000 Hz, \u0111\u1ec1u n\u1eb1m ngo\u00e0i d\u1ea3i tai ng\u01b0\u1eddi nghe \u0111\u01b0\u1ee3c t\u1eeb 16 Hz \u0111\u1ebfn 20.000 Hz.\"}}]}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>S\u00f3ng \u00e2m l\u00e0 s\u00f3ng c\u01a1 lan truy\u1ec1n trong c\u00e1c m\u00f4i tr\u01b0\u1eddng v\u1eadt ch\u1ea5t r\u1eafn, l\u1ecfng v\u00e0 kh\u00ed, \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi dao \u0111\u1ed9ng c\u1ee7a ngu\u1ed3n \u00e2m; s\u00f3ng \u00e2m kh\u00f4ng truy\u1ec1n \u0111\u01b0\u1ee3c trong ch\u00e2n kh\u00f4ng. Tai ng\u01b0\u1eddi b\u00ecnh th\u01b0\u1eddng nghe \u0111\u01b0\u1ee3c s\u00f3ng \u00e2m c\u00f3 t\u1ea7n s\u1ed1 kho\u1ea3ng t\u1eeb 16 Hz \u0111\u1ebfn 20.000 Hz. \u0110\u00e2y l\u00e0 ki\u1ebfn [&hellip;]<\/p>\n","protected":false},"author":102,"featured_media":570869,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"s\u00f3ng \u00e2m l\u00e0 g\u00ec","_yoast_wpseo_title":"S\u00f3ng \u00e2m l\u00e0 g\u00ec? M\u00f4i tr\u01b0\u1eddng truy\u1ec1n, t\u1ed1c \u0111\u1ed9 v\u00e0 \u0111\u1eb7c tr\u01b0ng c\u1ee7a \u00e2m","_yoast_wpseo_metadesc":"S\u00f3ng \u00e2m l\u00e0 g\u00ec? S\u00f3ng c\u01a1 truy\u1ec1n trong r\u1eafn, l\u1ecfng, kh\u00ed, kh\u00f4ng truy\u1ec1n trong ch\u00e2n kh\u00f4ng; t\u1ed1c \u0111\u1ed9 trong kh\u00f4ng kh\u00ed ~340 m\/s, d\u1ea3i nghe \u0111\u01b0\u1ee3c 16-20.000 Hz.","footnotes":""},"categories":[3910,30453],"tags":[],"class_list":["post-570864","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kham-pha","category-kien-thuc"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>S\u00f3ng \u00e2m l\u00e0 g\u00ec? M\u00f4i tr\u01b0\u1eddng truy\u1ec1n, t\u1ed1c \u0111\u1ed9 v\u00e0 \u0111\u1eb7c tr\u01b0ng c\u1ee7a \u00e2m<\/title>\n<meta name=\"description\" content=\"S\u00f3ng \u00e2m l\u00e0 g\u00ec? S\u00f3ng c\u01a1 truy\u1ec1n trong r\u1eafn, l\u1ecfng, kh\u00ed, kh\u00f4ng truy\u1ec1n trong ch\u00e2n kh\u00f4ng; t\u1ed1c \u0111\u1ed9 trong kh\u00f4ng kh\u00ed ~340 m\/s, d\u1ea3i nghe \u0111\u01b0\u1ee3c 16-20.000 Hz.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hoanghamobile.com\/tin-tuc\/song-am-la-gi\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"S\u00f3ng \u00e2m l\u00e0 g\u00ec? M\u00f4i tr\u01b0\u1eddng truy\u1ec1n, t\u1ed1c \u0111\u1ed9 v\u00e0 \u0111\u1eb7c tr\u01b0ng c\u1ee7a \u00e2m\" \/>\n<meta property=\"og:description\" content=\"S\u00f3ng \u00e2m l\u00e0 g\u00ec? S\u00f3ng c\u01a1 truy\u1ec1n trong r\u1eafn, l\u1ecfng, kh\u00ed, kh\u00f4ng truy\u1ec1n trong ch\u00e2n kh\u00f4ng; t\u1ed1c \u0111\u1ed9 trong kh\u00f4ng kh\u00ed ~340 m\/s, d\u1ea3i nghe \u0111\u01b0\u1ee3c 16-20.000 Hz.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/hoanghamobile.com\/tin-tuc\/song-am-la-gi\/\" \/>\n<meta property=\"og:site_name\" content=\"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/hoanghamobilecom\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/hoanghamobilecom\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-27T08:07:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/song-am.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"628\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Nguy\u1ec5n Xu\u00e2n Thi\u00ean\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nguy\u1ec5n Xu\u00e2n Thi\u00ean\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 ph\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/hoanghamobile.com\\\/tin-tuc\\\/song-am-la-gi\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/hoanghamobile.com\\\/tin-tuc\\\/song-am-la-gi\\\/\"},\"author\":{\"name\":\"Nguy\u1ec5n Xu\u00e2n Thi\u00ean\",\"@id\":\"https:\\\/\\\/hoanghamobile.com\\\/tin-tuc\\\/#\\\/schema\\\/person\\\/82f19cb5a6fb9de82c288acacfe400c5\"},\"headline\":\"S\u00f3ng \u00e2m l\u00e0 g\u00ec? M\u00f4i tr\u01b0\u1eddng truy\u1ec1n, t\u1ed1c \u0111\u1ed9 v\u00e0 \u0111\u1eb7c tr\u01b0ng c\u1ee7a \u00e2m\",\"datePublished\":\"2026-07-27T08:07:50+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/hoanghamobile.com\\\/tin-tuc\\\/song-am-la-gi\\\/\"},\"wordCount\":1624,\"publisher\":{\"@id\":\"https:\\\/\\\/hoanghamobile.com\\\/tin-tuc\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/hoanghamobile.com\\\/tin-tuc\\\/song-am-la-gi\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/hoanghamobile.com\\\/tin-tuc\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/song-am.jpg\",\"articleSection\":[\"Kh\u00e1m Ph\u00e1\",\"Ki\u1ebfn Th\u1ee9c\"],\"inLanguage\":\"vi\",\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/hoanghamobile.com\\\/tin-tuc\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/hoanghamobile.com\\\/tin-tuc\\\/song-am-la-gi\\\/\",\"url\":\"https:\\\/\\\/hoanghamobile.com\\\/tin-tuc\\\/song-am-la-gi\\\/\",\"name\":\"S\u00f3ng \u00e2m l\u00e0 g\u00ec? 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